Table 5.

Prediction of asthma using PC20 values of ≤25 mg/ml and ≤50 mg/ml

Sensitivity	Specificity	PPV*	NPV †
44.2	75.2	88.5	24.0
62.4	52.2	84.8	24.7

Abbreviations: * PPV positive predictive value, ^† NPV negative predictive value.